I'm hearing great things about both openers. While The Strain's vocals get to me sometimes but I really dig the music. Decapitated's new stuff has been described as Meshuggah-esque.
I'll be there early tomorrow...
7/30 - Offspring
8/4 - Soundgarden & NIN
9/27 - Clutch
10/24 - Judas Priest & Steel Panther